Abstract

A variety of pole-mounted cameras have been developed for monitoring nest cavities. However, currently available camera systems may either be prohibitively expensive or difficult to assemble. I developed an inexpensive (<$500 US) and easily assembled camera system that allows researchers to monitor cavity nests from the ground. The system consists of a small camera, a cable connecting the camera to a ground-level power source and laptop computer, and a flexible neck connecting the camera to a telescoping pole. During a study of Red-headed Woodpeckers (Melanerpes erythrocephalus), I used this camera to inspect 16 nests and found that the images were clear and allowed accurate counts of eggs and nestlings. This camera system uses standard, off-the-shelf components, and can easily be altered. The design is not appropriate for humid or dense-canopy environments because of the inclusion of a laptop and its wired design. However, this design makes the system inexpensive and allows researchers to save, edit, and view nest inspection recordings. RESUMEN Una variedad de camaras montadas en poste se han desarrollado para el seguimiento de los nidos de cavidad. Sin embargo, los sistemas de camaras disponibles en la actualidad pueden ser prohibitivamente costosos o dificiles de montar. He desarrollado un sistema de camaras relativamente barata (<500 dolares EEUU) y facil de montar que permite los investigadores monitorear los nidos de cavidad desde la tierra. El sistema consiste de una pequena camara, un cable que conecta la camara a una fuente de energia a nivel del suelo y a una computadora portatil, y un cuello flexible que conecta la camara a un poste telescopico. Durante un estudio de Melanerpes erythrocephalus, utilice esta camara para inspeccionar 16 nidos y encontre que las imagenes eran claras y permitian conteos precisos de huevos y pichones. Este sistema de camara utiliza componentes estandares y accesibles, y puede ser facilmente alterado. El diseno no es adecuado para ambientes humedos o de dosel denso debido a la inclusion de una computadora portatil y su diseno alambrico. Sin embargo, este diseno hace que el sistema sea relativamente barata y permite los investigadores guardar, editar y ver las grabaciones de las inspecciones de nidos.

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